LAS VEGAS — Jamie Tyler was stressed. He had just endured a half-hour slog through airport security and needed some relief. Many travelers in this situation might have headed for the nearest bar or popped an aspirin. But Tyler grabbed a triangular piece of gadgetry from his bag and held it to his forehead.

As he closed his eyes, the device zapped him with low-voltage electrical currents. Within minutes, Tyler said, he was feeling serene enough to face the crowds once again.

This is no science fiction. The Harvard-trained neurobiologist was taking advantage of one of his own inventions, a device called Thync, which promises to help users activate their body's “natural state of energy or calm” — for a retail price of a mere $199.

Americans’ obsession with wellness is fueling a new category of consumer electronics, one that goes far beyond the ubiquitous Fitbits and UP activity wristbands that only passively monitor users' physical activity. The latest wearable tech, to put it in the simplest terms, is about hacking your brain.

These gadgets claim to be able to make you have more willpower, think more creatively and even jump higher. One day, their makers say, the technology may even succeed in delivering on the holy grail of emotions: happiness.